Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 851:

  Which of the following statements regarding the application of electrical conduction via gases is/are correct?
  Electrical conduction in gas is applied in:
  (i) The identification of gases
  (ii) Lighting/fluorescent tubes
  (iii) Photocells
  (iv) Cathode ray oscilloscope/T.V. tubes

  Options:
  A) (i), (iii) and (iv) only
  B) (i), (ii) and (iv) only
  C) (ii), (iii) and (iv) only
  D) (i), (ii) and (iii) only
  Show Answer
  The correct answer is B .
• Question 852: A body accelerating will have a constant speed if it is Options:
  A) falling from a height
  B) in equilibrium
  C) moving in a circular path
  D) moving in a straight line
  E) oscillating
  Show Answer
  The correct answer is C .
• Question 853: The temperature at which the water vapour present in the air is just sufficient to saturate air is Options:
  A) Boiling point
  B) Ice point
  C) Saturation point
  D) Dew point
  Show Answer
  The correct answer is D .
• Question 854:

  I. The number of neutrons released exceeds the number that caused the fission.

  II. There is loss of mass.

  III. Energy is produced.

  IV. Smaller nuclei merge to form larger nuclei

  Which of the statement above are correct about nuclear fission?

  Options:
  A) II,III and IV only
  B) I, II and IV only
  C) I,II and III only
  D) I, III and IV only
  Show Answer
  The correct answer is C .
• Question 855: An object of mass 400g and density 600kgm^-3 is suspended with a sting so that half of it is immersed in paraffin of density 900kgm^-3. The tension in the string is Options:
  A) 1.0N
  B) 3.0N
  C) 4.0N
  D) 5.0N
  Show Answer
  The correct answer is B .
• Question 856: The wavelength of a stationary wave is 36.0cm. What is the distance between a node and the next anti-node? Options:
  A) 6.0cm
  B) 9.0cm
  C) 18.0cm
  D) 360cm
  E) 72.0cm
  Show Answer
  The correct answer is B .
• Question 857: A concave mirror has a radius of curvature of 36cm. At what distance from the mirror should an object be placed to give a real image three times the size of the object? Options:
  A) 12cm
  B) 24cm
  C) 48cm
  D) 108cm
  Show Answer
  The correct answer is B .
• Question 858: A household refrigerator is rated 200 watts. If electricity costs 5k per kWh, what is the cost of operating it in 20 days? Options:
  A) N4.80
  B) N48.00
  C) N480.00
  D) N4800.00
  Show Answer
  The correct answer is C .
• Question 859: A radioactive element has a half life of 4 days. The fraction that has decayed in 16 days is? Options:
  A) (15)/16
  B) (1)/16
  C) (3)/4
  D) (1)/4
  Show Answer
  The correct answer is A .
• Question 860: When a positively charged rod is brought nearer the cap of a positively charged electroscope, the leaves divergence will Options:
  A) be induced
  B) converge
  C) diverge
  D) remain constant
  Show Answer
  The correct answer is C .